Don,

Jane is well-known over here in the UK, one of those facts that "every schoolboy knows"

But I did a lot of reading up on the Tudors and the Stewarts for my own interest anyway.

Wiki is quite good on Jane http://en.wikipedia.org/wiki/Lady_Jane_Grey

And if you like movies I can recommend Lady Jane starring Helena Bonham-Carter and Cary Elwes with Patrick Stewart playing Jane's father.

That's the only real Stewart connection

But the Stewart tartans are considered universal anyway so don't let the Grey unrelatedness put you off.